Pneumatic cut-off for dump-cars.



J. M. WILOOX. PNEUMATIC CUT-OFF FOR DUMP (JARS. APPLiOATION FILED JAN. 25, 1910.

ggg gqy Patented June 11, 1.912.

2 SHEETSSHEET 1.

J. M. WILCOX.

PNEUMATIC CUT-OFF FOR DUMP CARS.

APPLICATION FILED JAN.25, 1910.

gg ggy Patented June 11, 1912.

2 sums-sum 2.

cisrrn n siinrns rgrnntr OFFICE;

WHEN M. 'WILGGX, OF GHECAG-O HEIGHTS, ILLINOIS, ASSIG FI'OBI, BY MESNE ASSIGll- MEETS, Tl) THE KILBQURNE JACOBS MANUFACTURING COMPANY, OF COLUMBUS,

ilft'ilIO, A EGEPORATZON OF OHIO.

PNEUMATIC GUT-brie FOR DUMP-CARS.

Specification of Letters Patent.

Patentec llTune 11, 1912.

Application filedjan'uary 25, 1910. Serial No. 540,040.

To all whom it may concern:

lie it known that I, JOHN M. NILCOX, a citizen of the United States of America, and resident of Chicago Heights, Cook county, Illinois, have invented a certain new and "useful l fl'lpl'ol 'ellltillli in Pneumatic Cut-Oils for Dump-Cars, oil which the following is a specification.

My invention relates to dump cars of that particular character in .which pneumatically-operated devices are employed for op: erating the tilting body of the car. In dump cars of this kind upright cylinders have been used, oneet each side of the car, and the piston of each 0 linder has been connected with one side 0. the tilting body oi? the our. Suitable connections have been employed for supplying air to said cylinders, and for controlling the admission of air thereto, whereby it was possible tov tilt the body of the car to either side, for the purpose of dumping the load, or for the purpose of righting the car. Ineach case, hon-ever, the arrangementwas such that the air would enter the cylinder and continue to do so until the exhaust was established. (Frdinarily, this meant that the air pressure would remain in communication with the cylinder until the air was discharged from the feed pipe by the manual operation. of a valve at some point in the system. Consequently, there was :1. considerable waste of air, and certain other objections, incident to the use oi dump cars constructed on the old plan. i

The object of my invention. is, therefore, the provision of a pneumatically-operated dump car having means for automatically cutting off the air as soon as the body of the car is operated or tilted to the desired position, the arrangement being such that the movement ofthc' piston serves to'open. ate the automatic cut-oil mechanism, whereby the air pressure is disconnected from the cylinder as soon as, or a little before, the body reaches a position suitable for dumping.

It is also an object to provide a dump car this hind in which. the air will be. autolly out off when the car is righted or normal position, whereby the nrc will be disconnected from the cylinder as soon as, or a little before, the body of the car assumes a horizontal position,

To the foregoing and otheruseful ends,

after set forth and'claimed. V In the accompanymg drawings-Figure 1 s an end view, with certain ort-ions broken my invention consists in matters hereinaw'ay, of a dump carembo ying the prin ciples of-my invention, Fig. 2 is an en: larged sectional view of one offthe cylinders of said dump car, showing the'ina'imer in which the air is automatically cutoll'when the p ston moves to the top of the cylinder, and the manner in which-the 'airis automatically discharged from the cylinderwhen the pressure is cut ofiordisconnccted from the feed pipe. Fig. 3is mdiagram of several dump (is-reconnected together, illustrating the system of piping which my invention. involves, whereby the cars maybe dumped either separately 'or' together, each car, however, serving automatically to cut off the air entering its cylinders, both when the car is dumped and whenithe body thereof is righted or' restored to its" normal position. Fig. 4 is an enlarged detail plan view of the automatic out off valve. Figs. 5 and 6 are detail fragmentary views showing aneihrr form of my invention. l 7

As thus il'hls't-rated, the tilting car body A may be of any suitable,"kno\v11 or epproved construction, and maybe mounted upon a truck of any.suitable character. As

shown, it tilts about a longitudinal axis B,

in the usual and wellunderstoodmanner. The upright cylinders C are disposed at 0ppositc sidesoffthe truck, and their. piston rods ,0 have'suitable connections 0 (which are shown broken away for convenience of illustration) with the bottom of 'the car body. These connections are of such character, preferably, that ifthe piston at the left is operated while the bodyxis in a hori- I it will be tilted over to the right for the purpose of discharging its load at that side.

However, if the load has been discharged to the left. of the car, so that the left hand side of the car bod is'down, then'the actuation of the piston 1n the cylinder at the left in Fig. .1, will operate to restore the car body to its normal horizontal, position. In other words, either cylinder can be used for either dumping or righting the body of the car, in the well known manner. 1

Each cylinder'is provided with an admis sion opening 0 which is also a discharge opening, Fig. 2.. The feed pipes D (see Flg. 3) are connected by pipes d with reservoirs d, and the supply of air from the reservoirs to the said feed pipes is controlled by the valves d", one for each car. The branch pipes d are connected through the cut-off valves d wlth the opening 0, one for'e'ach cylinder, and for each valve d there is a by-pass pipe d, which latter contains a check valve d. This check valve prevents the admission of air throughthe by-pass to the cylinder and normally prevents the escape of air through the discharge opening (1; The 'valve (1, 1S operated by an arm d", turn 0 erated by a vertically movable pm (1. T is pin is Operated by the piston head, when the latter moves upward, and the ,air is thereby automatically cut ott or disconnected from the cylinder. The pressure in the by-pass pi e d keeps the valve d normall closed, But this valve opens as soon as t e pressure is disconnected or cut oil from the feed pipes, and the air from the cylinder then escapes through the opening Thus the upward operation of the'piswhether for dumping or righting the car body, serves automatically to cutofi the air, and thus the air is not wasted by allowing it to enter after the operation 0 dumping or righting is completed, as was formerly the case."

The cut off Fig. 4) which operates to keep t ton,

valve has a springs?" (see arm (i pressed down against the head or top of the pin d wherebythe mechanism is always in condition to be operated as soon as the piston head moves upward afdistance. As shown, the air will be cut. off before the piston head reaches the limit of its upward movement; thus economy is secured in the use of the air, and a considerable saving is obtained. a

Each car may be provided with a reservoir (1', containing compressed air, whereby the cars can be operated separately or together, depending upon the re ulrements and the character of the work. f desired, several cars can be connected together and dumped simultaneously by the operation of at the bottom thereof, as shown in which latter is in one valve, in a manner that will be readily understood. Or, if necessary, any particular car can be cut out or disconnected and operated by itself, in the manner explained. And by introducing cut out valves between the cars each car in a connected train can be dumped separately and independently of the others.

Broadly considered, my invention, it will be seen, contem lates the automatic cutting off ofthe air rom the operating cylinder upon the tilting of the car body in either 1 direction, and for either purposethat is to say, for either dumping the load or rightthe car. As shown, the automatic cut 0 is operated by the piston in the cylinder,

but it is obvious that other connections or arrangements may be employed for causing thecut-ofi" to be operated upon the movement of the body, or by the operation of dumping the load in any other suitable manner,'or upon the restoration. of the car to normal position. As I say, therefore, my invention contemplates broadly a pneumatically operated dump car in which the air is automatically out off by the operation of the car. 7

As shown in Figs. 5 and 6, the top of the cylinder is cast with a passageE which con nects withthe feed p1pe,'and the pin e is provided vwith'an opening e, which latter controls the said passage. Inthis way the automatic cut ofi' valve is mounted directly in the top of the cylinder, and no external connections are necessary. spring can be used for keeping thesald pin normally depressed. WVhen the piston moves upward,

and the pin is also moved upward thereby,

the air coming through the passage'E is cut oil, and the pressure is disconnected from the cylinder.

It will be understood, of course, that I do not limit myself to the use of air, as any other fluid can be used which will serve the pur ose.

at I claim as my invention is: 1. In a dump car, a tilting body, an upright c linder at each side of the car, pistons cylinders, suitable means between said pistons and thesaid body, whereby the in sai body may be'tilted and then restored to normal position, means for admitting air to the said cylinders, and automatic means operated for cuttin oif the air upon the moving of the car bo y both to tilt the same and to restore said body to normal position.

2. In a ,dump car, a tilting body, a cylinder and piston connected with said body, for operating the latter, said cylinder having an opening at one end thereof, apassago communicating with said opening to supply air to said cylinder, :1 cut off valve for said passage, a by-pass around said out of? valve, a check valve in said by-pass to prevent the air from passing through the by-pass to the 1 cylinder, said bypass wraiwtiafi. with an exhaustopening nsrmally abuser by said check valve, and means for r'edugiug illm pneasme in the pipe, whereby km check valve is than operated by the: prezaiauire in Hm cylinder, causing the @xh "1st 0f air flnez'efrom thmugh saici 039s: s.

in 2. dump cm", tifii-iny ismfiy, a; cylin der and pisicn cmmxacted mil said; body; for operating the i431 pin at ihe top of the cylinder adapiei. is: be actm'mi h the up Ward mm'emeut 3f the piston head, meang,

for SUISlfiXillzj air presswu e t0 the cylinder 10 operate said piston upwardly, a cut-0E valve for controlling the admisslon of pressurq to the cylinder, Qpemted by said pin, whereby the pressm'e is cus ofi when the pistion reaches a predetermined paint in its upward movement. 4

Ewigned by me at Chicage, Illinois, this; 215% day of January, 1910, JOHN M. WIL-COX.

\NifihnasSes LILLIAN H. MAcHENfiY, EDWARD D. POMEROY. 

